Printable 10 More 10 Less Worksheet | Grade 1 Math

This focused math worksheet helps first and second-grade students master mental math by finding ten more and ten less than a given two-digit number. Practicing this essential place value skill builds a strong foundation for fluent addition and subtraction without relying on manual counting.

At a Glance

• Grade: 1 · Subject: Math
• Standard: CCSS.MATH.CONTENT.1.NBT.C.5 — Mentally find ten more or ten less than a number
• Skill Focus: 10 More and 10 Less
• Format: 2 pages · 10 problems · Answer key included · PDF
• Best For: Independent practice and review
• Time: 10–15 minutes

This printable resource features two pages with 10 multiple-choice questions designed to reinforce place value. The set includes standard numerical questions and visual problems using base-ten blocks. Students evaluate true/false statements and select correct answers from four options. A complete answer key ensures quick grading.

• Guided practice: Initial problems incorporate base-ten blocks, allowing students to visually group tens and ones.
• Supported practice: Students evaluate true or false statements about adding or subtracting ten, reinforcing logical reasoning.
• Independent practice: Final questions require learners to mentally calculate ten more or ten less from two-digit numbers.

This structure follows a gradual-release model, moving from concrete visuals to abstract calculations.

This worksheet is directly aligned to primary standard CCSS.MATH.CONTENT.1.NBT.C.5: Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. It also supports second-grade review for mentally adding or subtracting 10 from larger numbers. Both standard codes can be copied directly into lesson plans, IEP goals, or district curriculum mapping tools.

Deploy this worksheet during independent math centers after direct instruction on place value. It serves as excellent morning work or a quick formative assessment. While students work, observe whether they correctly identify that only the tens digit changes. Expect students to complete the 10 problems within 10 to 15 minutes.

This resource is ideal for first-grade students developing mental math skills, and second graders needing place value review. Base-ten block visuals provide built-in differentiation for visual learners. Pair this worksheet with physical manipulatives or a hundreds chart to support students mastering groups of ten.

Developing mental math fluency with place value is a critical milestone in early elementary mathematics. According to EdReports 2024, instructional materials that emphasize base-ten structures significantly improve students' ability to perform mental calculations efficiently and accurately. This targeted worksheet directly addresses CCSS.MATH.CONTENT.1.NBT.C.5, requiring students to mentally find ten more or ten less than a number without relying on manual counting. By systematically transitioning learners from visual base-ten block representations to abstract numerical reasoning, educators can effectively foster deeper conceptual understanding. Mastery of this specific foundational skill reduces reliance on rote counting methods and prepares students for more complex multi-digit addition and subtraction tasks in subsequent grades. Utilizing focused practice tools like this one ensures that critical foundational gaps are addressed early in the learning progression, ultimately promoting long-term mathematical proficiency, number sense, and overall confidence in academic problem-solving scenarios.